Pneumatic tire



P. E. VAN BERENDONCK.

PNEUMATIC TIRE.

APPLICATION FILED NOV. a. 1918.

1,332, 149. Patented Feb. 24, 1920.

4 SHEETS SHEET l.

P. E. VAN BERENDOIIICK.

PNEUMATIC TIRE.

APPLICATION FILED NOV. 9' IBM].

1,332,149., I Patented Feb. 24,1920.

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PNEUMATIC TIRE.

APPLICATION FILED NOV. 9. I918.

1,332, 149. Patented Feb. 24,1920.

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PNEUMATIC TIRE.

APPLICATION FILED NOV. 9. 19m.

1,332,149. Patented Feb. 24,1920.

4 SHEETS-SHEET 4.

35% 7775 G'HOZHCA? MWAZMQWZ/JU UNITED STATES PATENT OFFICE.

PHILIPPE EMILE VAN BERENDONCK, 0F AMSTERDAM, NETHERLANDS, ASSIGNOR T0 BERENDONCKS SECTION TYRE SYNDICATE, LTD., 0F AMSTERDAM, NETHERLANDS.

YNEUMATIC TIRE.

Specification of Letters Patentf Patented Feb, 24, 1920,

Application filed November 9, 1918. Serial No. 261,904.

invention being to provide a shoe of this character which is normally of considerably v greater diameter than the rim to which it is to be applied, whereby all of such sections can be applied to the rim only when the sections are compressed.

A further object of the invention is to provide an improved apparatus for placing the tube sections under compression when applied to the rim. 7

A still further object of the invention is to provide, in combination with a shoe of the character set forth, improved means for locking the shoe sections together on the rim.

With the foregoing and other objects in view, which will appear as the description proceeds, theinvention consists in the novel features of construction and combination of parts which will be more fully described hereinafter and particularly pointed out in the claims.

In the drawings accompanying and form ing part of this specification,

Figure 1 is a longitudinal sectional view through a portion of a tire casing or shoe, illustrating the manner in which adjacent sections are connected and also showing a preferred form of means for locking adjacent sections together on the rim;

Fig. 2 is a transverse sectional view of a shoe applied to a rim and illustrating thelocking means shown in Fig. 1;

Fig. 3 is a fragmental, partly sectional view of a tire, showing inside elevation an apparatus adapted to place the sections under compression on the rim;

Fig. 4 is a sectional view taken at right angles to the view shown in Fig. 3 and showing only a portion of the shoe; 7

Figs. 5 and 6 are detail side and end views respectivelv of a portion of the apparatus shown in Fig. 3;

Fig. 7 is a side elevation of a device adapted to be used. for retaining, the sections under compression while the compressing apparatus is being removed, fragmental portions of two sections being shown at the ends of said retaining device;

Fig. 8 is an end view of said retaining device; and

Fig. 9 is a side elevation of a modified form of apparatus for compressing the sections on the rim. I

Similarcharacters of reference designate the same parts in the different figures of the drawings.

Referring to the drawings, 1 designates a plurality of sections having their opposite ends oppositely recessed, whereby the sections may be joined together as shown in Fig. 1 so as to form a complete outer casing or shoe for a pneumatic tire.

As hereinbefore stated, it is oneof the objects of this invention that when the shoe is in place on the rim with which it is intended to be used, the sections "of the shoe shall be under a high state of compression, and for this reason the sections are of such a length that when united with their ends joined as shown in Fig. 1 so as to form a complete shoe, the shoe is normally, that is to say when not under compression, considerably larger than the rim to which it is to be applied, so that when all of the sections are applied to the rim, the entire shoe will be under a high compression.

As shown in the drawings the rim 3 and the shoe are of the usual clencher form.

For holding the ends of adjacent sections together, I have provided an improved 1 locking device, one form of which is shown in Figs. 1 and 2. This locking device consists of a plurality of plates 2, one for each shoe section, curved to conform to the periphery of the rim. Secured to this plate 2 by means of rivets 6 isa second plate 5 bent so as to provide a pair of angular side p01 tions or wings adapted to bear on the inner side of the beads of the shoe. An intermediate plate 7 may be inserted between the plates 2 and 5 in order to provide suflicient space between'such plates to receive the longitudinal edges of the sections 1. In order to protect the inner tube of'the tire from iniurv by direct contact'with the plate 5, said plate is provided with a covering of canvas or other suitable material, one side, as for instance 8 of said flexible covering member being clamped by means of therivet 6 between the plate 5 and the plate 7 and the other side 9 of said covering completely covering the inner side of the plate 5 and the heads of the rivet 6, the longitudinal edges of the members Sand 9 of the cover being suitably secured together. The members 8 and 9 ofthe protecting cover are longer than the plate 5, so that the ends of adjacent cover overlap each other, as shown at 10, in Fig. 1, whereby the locking members when arranged with their ends abutting along the periphery of the wheel are tightly joined together and the inner tube is thoroughly protected against injury by contact with the blade 5. One of these locking members is adapted to bridge the over-lapping ends of each pair of shoe sections 1, thereby to securely retain said sectionsin contact with each other.

In Figs. 3 to 6 inclusive '1 have illustrated one form of apparatus for compressing the sections of the shoe after all but one of said sections have been applied to the rim, so as to permit the insertion of the last section. This apparatus consists principally of two lever arms 18 and 19. respectively (see Figs. 3,5 and 6) pivotally secured together by means of a pin 20, a bent member or frame 24 being also secured by means of an ear or lug 23 on the same pivot pin 20 and through an opening in which frame the end of a hand lever 25 (see Fig. 4) is adapted to pass. This hand lever may be fulcrumed between a pair of pins 31 secured adjacent to the upper ends of-a pair of standards. 26 which are pivotally mounted at their I ends with an enlarged portion 21 and 22 respectively, each of said portions being of suflicient length to extend across the middle portion of the rim into engagement with an L-shaped member 32 at each side thereof,

said member having a flange 33 adapted to engage the end face of the bead of the shoe section. The operation of this compressing apparatus will be described hereinafter in connection with the operation of applying the shoe sectionjto the rim. V j

A preferred form of apparatus for compressing the shoe sections is shown in Fig.

9. In this apparatus ablock member 40 is provided, having an opening through which passes a bolt 44, said bolt being pro vided with a cross rod 45 forming a pair of handles by which the bolt may be rotated.

Immediately below thehandle 45 the bolt is enlarged so as to form a collar 46 adapted to engage the upper SlClBOf the block 40, a second collar 4? being secured on the bolt immediately below the lower side or the block 40 by means of a pin 48 passing through the bolt. The bolt is provided at its opposite end with a wing nut engaging the threads of the. bolt. bifurcated at each side of the bolt 44 for the reception of a pair of levers 41 and 42 respectively, which levers are pivoted between the bifurcated portions of the block by means of a pair of pivot pins 43. The levers 41 and 42 are also provided at their free ends with enlarged portions adapted to engage the beads of the shoe sections in 21 and 22 of the levers shown in Fig. 3.

In View of the fact that the sections of the shoe must be compressed in order to apply all ot the sections to a rim, it follows that as soon as allot the sectionsjbut one have been applied these sections must be compressed by means or some apparatus similar to either of those illustrated in Figs. 3 and 9, and before the last section can be placed on the rim this apparatus must be The block 40 is a manner similar to the enlarged portions.

removed. For the purpose of retaining the I sections in compressed condition after the apparatus is removed, I' have provided a device which is illustrated in Figs. 7 and 8, and which device may be termed herein a distance piece. This distance'piece consists of a round bar or rod 35 which is curved to conform with the periphery of the rim. This bar is provided at each end thereof with a depending strip 36, 37 respectively, said strips belng secured tothe bar by means or rivets or in any other suitable manner.

Each of the strips is provided at its free end. with a flange 38 and 39 respectively, bent at right angles to the strips, thesefiangesbe ing of sufiicientlength to engage one bead of each of the tire sections. I a

The shoe is applied to the rim in the fol--- lowing manner: The inner tube is first placed in position on the rim in the usual way, with the stem of the airvalve passing through the opening formed in the rim. ,The first section or the shoe is then placed in the rim with one end'thereof at a distance from the valve stem opening in the rim of approximately-half the length o1 a section. first section'isreadily placed in position by merely lifting the inner tube slightly. n. locking member such as that described in connection withFigs. 1 and 2 is then placed on the rim and movedalong until the wedge portion of the bead 40f the shoe sections is engaged between the plates 2 and 5, this locking member being moved along until its inner end is approximately at the middleof the length of the sections. The second sec This the end of its bead between the plates 2 and 5 at opposite sides of the rim and sliding the section along until its end is engaged, and overlapped by the first section. A second locking membe; is then applied to the opposite end of this second section in a manner similar to the first locking member. This operation is all done by hand, and it is continued until all but one of thesections are in position on the rims. It is now necessary to compress the sections to permit the insertion of the last section. With the apparatus shown in Figs. 3 to 6 inclusive, the L-shaped members are placed with their flanges 32 beneath the beads of the shoe sections at opposite sides of the opening for the last section and beneath the portions of the inner tube at these points. It will be understood, of course, that there is no locking device at the ends of the shoe sections forming the end walls of this opening. The flanges 33 of the Lshaped members are thus in engagement with the exposed ends of the beads of the tire sections. The inner tube is now lifted so that its valve stem can be removed from the opening in the rim and that portion of the inner tube occupying the space between the ends of the shoe sections is lifted over the edge of the rim at one side thereof, while at the opposite side of the rim the frame 26 is placed beside the rim in such a position that the pin 29 passes through the valve stem opening in the wheel rim, whereupon the enlarged portions 21 and of the levers 1S and 19 are plac-d in engagement with the flanges 33 of the L-shaped member. which. have been placed at the ends of the shoe section. The hand lever is then moved along until the inner end thereof engages the opening in the frame 24-, whereupon, by exerting pressure in an upward direction on the outer end or the lever 25 the pivot 20 of the-toggle levers 18 and 19 is forced'downward so as to exert pressure on the flanges 33 of the |...shaped members whereby the sections are compressed togethe to any desired extent.

t is thought that the operation of the device illustrated in Fig. 9 will be perfectly obvious. In this instance, the threaded bolt i4 is inserted in the valvestem opening; in the rim and the wing nut 49 secured on the projecting end of the bolt, the nut being held against turning while the bolt is turned by means of the handle 45. By continued turning of the bolt dd the levers 41 and 42 will be forced downwardly and will act on the shoe sections in the manner already described in connection with the apparatus shown in Fig. 1.

As soon as the tire sections have been sufiieiently compressed together so as to have a space sufficiently long to receive the last section of the shoe between the extreme ends of the sections already applied, the distance piece already described is brought into use for maintaining the sections under compression while the compresslng appa- -ratus is being removed and the last section ing been first lifted to permit the bar to rest directly on the edge of the rim, the distance piece being of course of the proper length to maintain the sections under compression when the compressing apparatus is removed. In this position of the distance piece the flanges 38 and 39 of the strips 36 and 37 respectively, engage the beads at the ends of the opposing sections at one side of the rim, while that portion of the inner tube between the opposing sections hangs over the top of the distance piece. The distance piece will thus maintain the sections under compression while the compressing apparatusand the L-shaped members 32 are being removed. The inner tube is then returned to its place in the open space between the opposing sections, it being under? stood that the distance piece is inserted at the side of the rim opposite from that over which the inner tube has been lifted. The valve stem of the inner tube is then inserted through the opening in the rim. The last section of the shoe may now be inserted by hand in the following manner: The head at one side of the remaining section is introduced into the rim in the usual manner at the side opposite to that Where the distance piece is placed. The other head of the section at the side where the distance piece is placed, is pressed inwardly and forced down into the rim until its outer face at each end abuts against the depending strips 36, 37 respectively at the ends of the distance piece 35, whereupon the distance piece can be removed without difiiculty by lifting the bar 35 and pushing it somewhat away from the tire. During this operation the bead, owing to the elasticity of the tire, will jump into the inner edge of the rim, whereupon the compressed sections will expand somewhat, thereby also compressing the last Section between them. It is obvious, of course, that no locking member can be introduced at the ends of this last section.

Having thus described my invention, what I claim is:

1. The combination with the rim of a wheel, of a shoe comprising a plurality of sections, the normal diameter of said shoe being considerably larger than. that of the rim, whereby when all of such sections are 125 applied to the rim they are under a high compression.

2. The combination with the rim of a wheel, of a shoe formed of a plurality of sections, the normal diameter of said shoe 3 being larger than that of the rim, and locking members adapted to secure the ends of adjacent sections together.

3.;The combination with the rim of a Wheel, of a shoe formed of a plurality of sections, the normal diameter of said shoe being greater than that of the rim, whereby when all of said sections are appledto the rim they are under compression, and meansin presence of two witnesses.

PHILIPPE EMILE vim BERENDQNOK.

Witnesses:

L; DEERIEN, v H. B. JORRISSMA, 

